import java.util.ArrayList;

public class ctest70 {
    private ctest70(){}
    public static int getMaxAge(ArrayList<ctest68> list){
        int maxAge = list.get(0).getAge();
        for(int i = 0; i<list.size(); i++){
            int age = list.get(i).getAge();
            if(age>maxAge){
                maxAge = age;
            }
        }
        return maxAge;
    }
}
